Across
1
Solid with repeating atomic pattern
5
Blocking of light by a celestial body
8
Center of an atom or cell
10
Path of a planet around the sun
Down
2
Positive particle in nucleus
3
Disturbance that transfers energy
4
Tissue that contracts for movement
6
Substance with pH above 7
7
Group of similar cells
9
Unit of energy
11
Naturally occurring inorganic solid